Warner Oland

Dr. Fu Manchu

O. P. Heggie

Inspector Nayland Smith

Jean Arthur

Lia Eltham

Neil Hamilton

Dr. Jack Petrie

Evelyn Hall

Lady Agatha Bartley

William Austin

Sylvester Wadsworth

Margaret Fealy

Lady Helen Bartley

Shayle Gardner

Detective Harding

Evelyn Selbie

Fai Lu

Ambrose Barker